|Wang, Jichum - Jilin Agricultural University|
|Wen, Jiawei - Jilin Agricultural University|
|Liu, Wenpin - Jilin Agricultural University|
|Ren, Jinping - Jilin Agricultural University|
Submitted to: American Phytopathological Society
Publication Type: Abstract Only
Publication Acceptance Date: 5/4/2012
Publication Date: 8/4/2012
Citation: Wang, J., Jia, Y., Wen, J., Liu, W., Ren, J. 2012. Identification of blast resistance genes for managing rice blast disease. American Phytopathological Society Annual Meeting. Providence, RI. p.579. August 4-8, 2012.
Technical Abstract: Rice blast, caused by the fungal pathogen Magnaporthe oryzae, is one of the most devastating diseases worldwide. In the present study, an international set of monogenic differentials carrying 24 major blast resistance (R) genes (Pia, Pib, Pii, Pik, Pik-h, Pik-m, Pik-p, Pik-s, Pish, Pit, Pita, Pita2, Piz, Piz-t, Pi1 , Piz-5, Pi3, Pi5(t), Pi7(t),Pi9, Pil2(t),Pi11(t),Pi19, and Pi20) and the recurrent parent LTH (Lijiangxintuanheigu) for these monogenic lines were evaluated with 44 blast isolates collected from the major rice areas in Jilin Province. Rice plants grown to the 3 to 4 leaf stage were inoculated with blast conidia suspensionsat 5 X 105 conidia/ml under controlled environmental conditions. Six to 7 days after inoculation, disease reactions were evaluated. It was found that LTH was susceptible to all 44 isolates and all 24 monogenic lines were resistant to at least 4 isolates of M. oryzae. Among them, the percentage of isolates that demonstrated resistant reactions with the monogenic lines carrying Pi9, Pi19, Piz, Piz-5, Piz-t, Pi12(t) Pi5(t) and Pik-h were 94.2%, 84.1%, 81.8%, 81.8%, 79.5%, 72.7%, 68.2% and 68.2%, respectively. These results suggest that Pi9, Pi19, Piz, Piz-5, Piz-t, Pi12(t), Pi5(t) and Pik-h may be important for preventing blast disease in Jilin province. Progress on resistant spectra of these blast resistance genes will be presented.